1. Which of the following is an example of a primary sex characteristic?

emotionality

testes

breasts

body hair

The correct option is b) testes

Explanation:

Primary sex organs can be described as the organs which are directly involved in reproduction. These organs include the male and female gonads i, e testes and ovaries, external genitalia.

On the other hand, secondary sex characteristics can be described as the features that appear during puberty in humans, and at sexual maturity in other animals. Breasts, facial and body hair, body fat deposits, vocal change all are secondary characteristics.